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,.: .. , <br /> � MO D DE IGN WORK SHEET(For Flows u to 1200 d) <br /> �4.. A erage De �gn FLOW A-l: Eatimafed Sewage Flowa in Galiona per Day <br /> num r o <br /> Es ' ated J D.�gpd (see figure A-1) bedrooma c�asa� c�au n c�ass m c�ass iv <br /> or easured -- x 1.5 (safety factor) _ — gpd 2 �o0 225 �so � � <br /> . 1-Fo•���.: 3 . 450 300 218 of the <br /> a � W��T 1-F0�5�- 4 600 375 256 values ' <br /> B. S C TAN1K Capacity 5 750 450 294 in the <br /> �41� 6 900 525 332 Class I, ' <br /> , - , a o i. gallons (see figure Gl) NoUs� � -- � 3�o n,or ui <br /> a_� v�o�► V u�s-t'1r10►.� S�, 8 1200 675 408 columns. � <br /> C. S�ILS (refer to site evaluation) c-i: Se ticTankG �a� �s i <br /> l A a l4 j�• Liquid capaciry <br /> Nnmber of Minimum liquid liquid capacity with W���S � ; <br /> 1. Depth toxestricting layer= �.�`�� ��`' �a`.' feet s���� ����' �a��� sr��� <br /> 2. Depth of percolation tests = ► a" feet z a i� �so �izs 15� <br /> 3. Texture �v�1 M �5� c.���{Ln�v� s�a �000 �soo � <br /> S or 6 1500 2250 3� <br /> Percolation rate �.3 mpi ��$a 9 � � <br /> 4. Soil loading rate , �-1 S , gpd/sqft(see figure D-33) � <br /> 5. Percent l�r►d slope 7 % � <br /> D. R CK LAY�R DIMENSIONS <br /> 1. ultiply average design flow (A)by 0.83 to obtain required rock layer area. <br /> � gpd x 0.83 sqft/gpd = � � a sqft <br /> 2. etermine rock layer width= 0.83 sqft/gpd x linear Loading Rate (LLR <br /> .83 sqft/gpd x J a gpd/sqft= /o ft Mound LLR <br /> 3. ength of riock layer = area+width = <br /> 4t sq#t (D1) s ��ft (D2) _ �� ft < 120 M PI < � 2 <br /> E. R CK VOLUME > 120 M PI < 6 <br /> 1. ultiply rack area (Dl) by rock depth of 1 ft to get cubic feet of rock <br /> � sqft x 1 ft=���,cuft <br /> 2. 'vide cuf�by 27 cuft/cuyd to get cubic yards <br /> ctlft +27 cuyd/cuft=.�,._cuyd <br /> 3. ultiply cubic yards by 1.4 to get weight of rock in tons <br /> � cuyd x 1.4 ton/cuyd =��tons <br /> i D-33: Abaorpdon Width Sizfna Tible <br /> F. SF.�WAGE ABSORPTION WIDTH P"`°'•"°"�"` `�oidinaR'" <br /> in Minutea per Sal Te�cnue Gdlau Absorption <br /> � Inch per dayper Ratio <br /> ` MP! uarc foot <br /> f <br /> F.stcr tAan s Cwrse sand t.ZO t.00 <br /> � Medium S�nd <br /> Abso don width equals absorption ratio (See Figure D-33) `�oinySand <br /> times ock layer width (D2) <br /> ��04 �� . . <br /> �/� t t 46 to 60 SudY 4aY ��45_. � 2.67 <br /> � L� X-..L.y,�—it = �' '�• jt Silt Clay L.oim <br /> 61 to 120 Silty qay 0.2d 5.00 <br /> Su�dy Qay <br /> lowa than 120' <br /> Kynam daiprd(or Ywe oib m�q be aMr er perfomrse <br />